package com.zzf.contactstest

import android.Manifest
import android.content.pm.PackageManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.provider.ContactsContract
import android.util.Log
import android.widget.ArrayAdapter
import android.widget.Toast
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import kotlinx.android.synthetic.main.activity_main.*
import java.security.Permission

class MainActivity : AppCompatActivity() {

    private val contactsList = ArrayList<String>()
    private lateinit var adapter:ArrayAdapter<String>
    val testStr by later {
        Log.d("Tag","懒加载运行")
        "测试懒加载"
    }
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        adapter = ArrayAdapter(this,android.R.layout.simple_list_item_1,contactsList)

        contactView.adapter = adapter
        
        if (ContextCompat.checkSelfPermission(this,Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED){
            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_CONTACTS),1)
        }else{
            readContacts()
        }



        button.setOnClickListener {
            println("打印懒加载的值$testStr")
        }

    }

    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray
    ) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        when(requestCode){
            1->{
                if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                    readContacts()
                }else{
                    Toast.makeText(this, "你拒绝了权限申请", Toast.LENGTH_SHORT).show()
                }
            }
        }
    }
    
    private fun readContacts(){
        //查询联系人数据
        contentResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null,null,null,null)?.apply { 
            while (moveToNext()){
                //获取联系人姓名
                val displayName = getString(getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME))
                //获取联系人手机号
                val number = getString(getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER))
                contactsList.add("$displayName\n$number")
            }
            adapter.notifyDataSetChanged()
            close()
        }
    }
}